>The contrib/download_prerequisites script makes it very easy, you >don't need to install GMP etc. separately. thanks very much for you information, I have following the instruction, I have download different version of gmp,mpfr,mpc, so I create softlink of them in gcc directory. I don't want to mess my existing toolchain, so I export CXX/CC/CROSS_COMPILE/ to use existing toolchain to build gcc. following is the detailed information: 1.export environment export CXX=aarch64-linux-gnu-g++ export CC=aarch64-linux-gnu-gcc export CROSS_COMPILE=aarch64-linux-gnu- export sysroot=/opt/poky-agl/3.0.0+snapshot/sysroots/aarch64-agl-linux 2. my gcc build script: <----------------------------------------------------------------- #!/bin/sh /home/user/Downloads/cross_compile_gcc/gcc-linara-5.4.0/configure \ --prefix=/home/user/Downloads/cross_compile_gcc/install_gcc \ --build=x86_64-linux-gnu \ --host=aarch64-linux-gnu \ --target=aarch64-linux-gnu \ --enable-threads=posix \ --disable-libgcj \ --enable-multiarch \ --enable-fix-cortex-a53-843419 \ --disable-werror \ --enable-checking=release \ --program-suffix=-5 \ --enable-shared \ --enable-linker-build-id \ --enable-languages=c,c++ \ --enable-clocale=gnu \ --enable-libstdcxx-debug \ --enable-libstdcxx-time=yes \ --with-default-libstdcxx-abi=new \ --enable-gnu-unique-object \ --disable-libquadmath \ --enable-plugin \ --enable-nls \ --enable-multiarch \ --disable-browser-plugin \ --enable-java-awt=gtk \ --enable-gtk-cairo \ --without-included-gettext \ --disable-multilib \ CFLAGS="-g -O2" \ LDFLAGS="-fstack-protector-strong" ---------------------------------------------------------------> and then the config is alright, but when it goes into make, the following error happend: <------------------------- user@user-Latitude-5400:~/Downloads/cross_compile_gcc/build_gcc$ make -j8 2>&1 > selfbuild.log /home/user/Downloads/cross_compile_gcc/gcc-linara-5.4.0/libcc1/configure: line 14531: -T: command not found /home/user/Downloads/cross_compile_gcc/gcc-linara-5.4.0/libcc1/configure: line 14541: -T: command not found configure: error: Building GCC with plugin support requires a host that supports -fPIC, -shared, -ldl and -rdynamic. make[1]: *** [configure-libcc1] Error 1 make[1]: *** Waiting for unfinished jobs.... -------------------------> Do you have any idea why this happened? Thanks && BestRegards Samuel Jonathan Wakely <jwakely.gcc@xxxxxxxxx> 于2021年1月9日周六 下午10:29写道： > > On Sat, 9 Jan 2021 at 11:37, xian li <lixian2008cool@xxxxxxxxx> wrote: > > > > Thanks for your information, I have tried to use existing aarch64 > > toolchain to compile gcc only, but there is some problem( > > eg. '/usr/lib64/libgmp.la' is not a valid libtool archive even though > > I have configure with --with-gmp) , it make me think that I should > > compile gcc from scratch(glic,linux-kernel headers, mpfr,gmp,mpc so > > on), > > No. > > > am I right, or there is some way to use existing toolchain to build > > modified gcc? > > Just follow the steps at https://gcc.gnu.org/wiki/InstallingGCC > > The contrib/download_prerequisites script makes it very easy, you > don't need to install GMP etc. separately.
